只修改文件夹中文件的permission

One approach could be using find:

for directories
find /desired_location -type d -print0 | xargs -0 chmod 0755

for files
find /desired_location -type f -print0 | xargs -0 chmod 0644

 

来源：https://stackoverflow.com/questions/18817744/change-all-files-and-folders-permissions-of-a-directory-to-644-755